Ceiling for sound correction



I N A M/ @f June 6, 1933. F. J. SERSEN 1,913,249

CEILING FOR SOUND CORRECTION Filed Dec. 2, 1930 2 Sheets-Sheet 1 f2 INVENToR wlTNEssEs Y @ad T.,Se/:sezz

m ATTORNEY June 6, 1933. F. `.1. sERsEN 1,913,249

CEILING FOR SOUND CORRECTION Filed Deo. 2, 1930 2 sheets-sheet 2 WITNEssEs Q iw/ .Ina/'5621, 24%. bq C A u BY- m M ATTORNEY Patented .lune 6, 1933 UNITED STATES PATENTol-*PICE FRED J. SERSEN,

OF BROOKLYN, NEW YORK, ASVSIGNOR OF ONE-HALF KENYON B.- CONGER, JR., F ARDSLEY-ON-HUDSON, NEW YORK CEILING Forl soUNn oonaEcT'IoN .Application led December This invention relates to an acoustical correction structure.

The invention has for lts general obJcct the provision of improved means which climi*l natos interfering echoes by reflecting, trapping and absorbing sound waves within chambers, halls, rooms and walled enclosures.

'lhc nature of the invention and its distinguishing features and advantages wlll appear when the following specification is read 1n connection with the accompanying drawings, in which Figure 1 is a` fragmentary inverted plan view of a structure embodying features of the l5 invention;

Figure 2 is a, section on the line 2-12 of -Figurc l, Q y

Figure 3 is a. section on the line 3-3 of Figure 4 showing a modification of the in- 20. vention;

Figure 4 is a fragmentary inverted plan view.

In Figures 1 and 2 of the drawings there is shown a sound correction ceiling 1.0 which it 'is to be understood will be arranged within the contines of a chamber, hall, room or other walled enclosure below an adjacent section thereof which forms the usual ceiling 11, a fragment of which is shown.' The ceiling 10 isvconstructed of sheet material, preferably metal, and will consist ofsimilar parts or sections of uniform size. Each ceiling part or section will be developed from the sheetA metal to present deflecting areas or sections i2 and 13, and marginali attaching edges 11.

The sections 12. are arcuate, and these sections 12 are jon/ned by the sections 13 which converge in a downward direction relatively to each other in intersecting planesv so as to f urroun d the section 12, as shown most clearly in Figure 1. Eachof the .sections 13 has sound passages or openings 15 therein. The parts of the ceiling thus constructed are arranged in the same horizontal planes and are secured by means of spacers 16 and strips 17.

2, 1930. Serial No.'499,'554.

The spacers 16 are secured in place to the usual ceiling 11. The marginal edges 14 of` the ceiling parts l() are arranged between the spacers 16 and the strips 17, and the latter are secured to the spacers 16 in any practicalv 50 manner. It will therefore be apparent that the ceil-V ing 10 will be spaced from the usual ceiling 11 and the distance between these ceilings may be varied to meet certain requirements. l

From the 'foregoing it will be apparent that the sound waves will be defiected by the sections 12 and '13 and that some of the sound waves will pass through vthe openings 15 into the space between the ceilings 10 and 11. Sound waves will therefore be defiected and trapped to such anextent as to almost entirely eliminate/echoes or. reverberations. In accordancer with another feature means may be provided for absorbing sound vibrations, and to this end there are provided elements 18r which may be made of material having a relatively high coetiicient of sound absorption, such as mineral wool or felt. A similar element 18 is placed on each( of the vsections 12, the same conforming to the arcuf ate shape thereof so as to be held against f unintentional displacement'. In reference to Figure 2V it will be apparent that the elements 18 are disposed between the ceilings 10 and 11 and absorb? the sound vibrations trapped in the space between the ceilings 10 and 11.y

In Figures 3 and 4 there has been shown a modified form of securing means for the acoustical ceiling 10 in lieu of the spacers 16 and strips 17. lThe securing means shown in `Figures and 44 includes bar supports 2O which vare suspended from the usual ceiling 11 by hangers 21.` Clips 22 are hung "on the spacers 20 and are adapted to engage v the marginal edges of the parts of the ceiling 10 to hold them in place. Pieces of moulding 23 are secured to the lowerzedges of the supr ports 20 in any practical manner, as by 90 the use of screw bolts or the like 24, to give l to the ceiling l() a finished appearance. In

other respects the structure shown in Figures 3 and 4 will be similar to that shown in Figure 2, and for the sake of clearncss the absorptive elements 18 have been omitted from Figure 3.

I claim: 4

1. lhe combination with a chamber or en'- closure, of a ceiling within the contines of said chamber or enclosure' constructed of sheet material to provide sound deiecting sections conslsting of arcuate sections and downwardly extending sections bounding each of said arcuate sections, and said downwardly extending sections having sound passages therein.

2. An acoustical correction structure comprising the combination with a chamber or enclosure, of a ceiling constructed of sheet material which is developed to present relatively downwardly converging sections disposed at regular intervals inintersecting planes, and downwardly convexed sections bounded by said converging sections each of said converging sections having sound passages therein, and means securing said ceiling in place in spaced relation to the adjacent section of said chamber or enclosure.

3. An acoustical correction structure comprising the combination with a chamber or enclosure, ofa ceiling Within theconfines of said' chamber or enclosure, said ceiling consisting of similar members, each of said members being constructed of sheetmaterial to provide sound deflecting sections consistino` of convex sections and converging seetions ioined to and bounding the convex sections, certain of said sections having sound passages therein, and means' securing the member in place along its marginal edges only.

FRED J. SERSEN. 

